Float valve



D. s, 192s. l 1.564.764

A. R. EARNSHAW FLOAT VALVE Filed Jan. 4, 1924 A BY A TORNEYS WITNESSES:

Patented Dec. 8, 1925.

AAR'IIIIU'IRLR. EARNSHA'W, 0F WYNNEWOD,I PENNSYLVANIA.

PA oFFiec E.'

fj Y FLOAT vALVE.

Application 4led January 4, 1924. Serial No. 684,329.

To all whom t may. comer/n:

Be it known that I, ARTHUR R. EARrrsHAw,

i a citizen of the United States, residing` at Wynnewood, in the countyY of Montgomery..

and Stateof Pennsylvania, have invented certain new and useful Improvements in Float Valves, whereof the following is, al to the" ac-` specilication, reference being had companying drawings.

This invention relates tov it `has more particular reference to thattype commonly designated as automatic, the pri.VV

mary object being to. provide a valve thatis uninfluenced by pressure 4variations at alle p c with interposition of a 'suitable gasket 19 to` times.`

Another object of myinvention is to progI vide a float valve embodying adjustablev means whereby frictional retardationis reduced to a minimum or substantially eliminated. Y y,

A further object is the provisionv of a oat valve for use more especially in refrigerat= ing apparatus, the same functioning as. a check between the compressorand cooling unlt to permit the bulldmg of pressure for condensation of the gaseousrefrigerant; topermit said refrigerant as fast as itis iliquev lied under pressure to automatically liowl into the cooling coil; to prevent the entry.

into the latter of anyof the gaseous refrigerant; and to purge out any foreign :gas

i that may be in the system. Y

With the foregoing and other objects in view, this invention consists inl thev novel float valve, one practical embodiment whereof is hereinafter fully described,` illustrated by the accompanying sheetfof drawings, and more particularly defined by the subjoinedA claims.

Inthe drawings, wherein like characters 4 of reference designate the same .or corre-4.

Sponding parts in all the views g Fig. I, is a viewin elevation of part .sectional plan thereof;

valve is substantially fan-shaped infconv tour, said casing being a 'unitary structure embracing spaced front and back walls' 5,u

float valves, and'z y my novel iioat valve with parts broken away andy inf section to better disclose certain underlying c. y

` Y free end r'che' float l32 issecured by solder, or

III is a fragmentary detail ofy v 3419vv have a loosefit on the pivot pin 28,- orm of the invention 6 respectively, converging t walls `7, 8, and f curved wall 9, the latter having apertured y integral bosses 10, 11 for attachments herei inafter alluded to. .-The aforesaid wall 8, for example, is formed withv an outwardly projecting .neck 12, conveniently-though not essentiallyfrectangular Vin cross-Section` with a central bore 13, adapted `to receive Vthe correspondingly shaped insert portion14.

ofa ported block 15, This ported block 15 is formed with a surroundingflange `16.0f

like coniigurationwtoV the` neck v12, and to whichit is secured means of. studs 17v passedthrough holes 1 8 Vin said ,flangeensure an air Aand Huidtight connection-in thewell-known manner.

Centrally, and onv the exterior portion of-y the ported 'bl0ck15, is an elongated protuberance 20 that is longitudinally bored to provide a cavity 21, Vthe outer end whereof is screw-threaded to accommodate a disson lug "23 I drill a relatively smaller hole or port 26 that communicates with'the longi tudinal port 24 just described, andsaid small g port 26` is automatically opened and closed by mechanism now to be described.l

Transversely of the lug 23k vI .drill .a hole 27 affording bearing for apivotjpin or rstout wireg28-that is bent upon itself at29 and 'appropriately shapedto, provide an angled portionBO and-attaching-terminal'31. This i attaching terminal-,or free end 3l., it willbe observed, is conveniently twisted into a plane at right angles to the portion 30, and to said otherwiseas foundfmost convenient.

The4A valvemember proper conslsts of a rockable cut-off or shutter 33 apertured Vat and it is also'provided with oEsets v35 between WhCh one rlimb of .the aforesaid angled portion Oy snugly seats. It is to be particularly noted at this juncture that the abutting faces ofthe lug 23; and rockable cut-off or shutter 33 are machined and polished to reduce friction andprovid'e a seal. To more effectively minimize suoli possible friction, the cut-off or shutter 33 is prefer` ably gi'ooved transversely at 36, wherebyy the actual surface contact between the parts 23,

33 is further reduced, and the sensitivene'ss:

of the device increased. Y

In order to automatically compensate for' wear between the parts 23, 33, as well as to maintain close cooperation therebetween, I screw-thread the free end of the pivot pin 28 to receive a nut or nuts 37 between which andthe adjacent face of the lug 23 I interpOse a compression spring 38 that functions to retain the cut-ofi or shutter 33 in close or sealing contact w-itli the machined lface of the lug 23, as will be readily understood on examination of' Fig. II more particularly.

An inlet connection 33 is fitted to the apertured boss 1l, while a relief cock or Yvalve 39 is tted to theother boss 1'0 for manually or automatically purging any foreign gas or releasing any excess that may accumulate in the casing Assuming that my novel float lvalve is interposed between the liquor` line and condenser o'f a domestic refrigerating apparatus for example, it will be obvious that said float valve will constitute an automatic and absolute control over the supply of active refrigerant to the evaporator. Obviously the liquefied refrigerant accumulated in the casing 4 will thereupon flow through the port 24, cavity 2l and'discharge conduit 22 to the expansion coil. Still further it will be understood that by removing the studs 17, the entire valve mechanism can be withdrawn for cleaning, repair, or adjustment with a minimum expenditure of time andA labor.

From the foregoing description it will be vclearly apparent that the angular formation of the casing 4 provides a comparatively small housing or chamber just large enough toac'commodate the movements of the float 32, thereby obviating the necessity for trapping an excessive quantity of refrigerant in the casing. of the casing'4v prevents the float- 32 from rising toa position where the center of gravity would be such that it'would not fall and close kthe valve when the liquor level recedes; l

The cut-oft"v 33 isrockable on the pivot pin 28'so that it may always be held flat to the closure surface without being influencedfby any movement or torsionof'the float 'Still further'it will be apparent that byy my invention I have devised a simple, cheapV and very effective automatic float-valve, the

same being especially useful'for the purposes had in view; and while I have described in detail one practical embodiment and application thereof it is to be understood that the Furthermore the angular side 7 being transversely grooved whereby fric- Y tional resistance to movement is reduced' to a minimum, and a float secured, to the cut-0E ivot pin, saidclosure, cut-off and float, being removable as a connected unit.

2. A float l valve `embodying a casing having a pair of convergent walls and provision for a supply connection, one of .said walls having an apertured neck, a closure for attachment to said neck and affording a `discharge outlet, a cut-off' pivoted to a projection on said closure, lthe pivot member consisting of a rod bent upon itself to pro'- vide an angled portion with a terminal eX- tension, a float secured to the aforesaid terminal extension, and means whereby frictional resistance tov movement of the cut-off' is reduced to a minimum. y

3. A float valve embodying a casing having adjacent convergent walls and provision for a supply connection, oneY of said walls having an vapertured neck, a closurev for attachment to said neck and affording` a discharge outlet, a cutfoE pivoted topa projection on said closure, the pivot kpin consisting of a rod bent Vupon itself to provide an angled portion and terminal extension, said angled portion being engaged by ears on the cutoff', means wherc` by frictional resistancey to' movement of' the cut-oiis reduced to a minimum, and a'V float secured to the aforesaid terminal extension. j Y

4. A removable closureV for` float` Valves consisting of a unit having 'a cti-extensive` lug, a discharge cavity 'in said' unit, a communicating aXial duct and outlet port, a cut-'ofi' for the port, a pintle for said cut-oli fashioned to provide a pivot pin with an angled portion and terminal extension, a float secured to the terminal extension, offsets on the cutoff engaging the angled portion of the pivot pin, and an adjustable' spring for automatically maintaining the put-off in engagement with the aforesaid 5. As an article of manufacture a closure I unit for valves having a co eXtensive lug, an I aXia-l duct in ysaid unit connecting. a cavity with a discharge port, a cut-off for the port engaging the lug, a pintle for said cut-off fashioned to provide ay pivot pin with an angled portion and terminal eXtension, a float Secured to the terminal extension, off-sets on the out-off engaging the angled portion of the pivot pin, an adjustable spring for maintaining the outof in engagement with the aforesaid lug, the meeting faces of said lug and cut-off being ground and polished, a transverse re- 10 signed my name at Philadelphia, Pennsyl- 15 Vania, this 29th day of December, 1923.

ARTHUR R. niumsnnuv.

and attached vmeans Y 

